Electronics Forum | Wed Jun 25 08:50:54 EDT 2003 | russ
I believe that Fancort makes some finger protectors that are made of Metal (Aluminum, titanium, etc...) I don't know how well these would process through placement equipment however due to their thickness. Could you clean the Kapton residue off just
Electronics Forum | Thu Oct 28 18:14:51 EDT 1999 | John Thorup
Try looking for paste contamination somewhere. Dirty stencil, printer table or fixtures. Placement table/fixtures. Reflow belt/conveyer. Reuseable finger covers, if used. Try covering the fingers with Kapton tape during different stages of the proc
Electronics Forum | Mon Aug 02 11:44:49 EDT 2004 | jbabson1
If you do wire bond before printing, Photo Stencil (www.photostencil.com)can help you design a stencil with relief on the pwb side for the wirebonding.
Electronics Forum | Mon Aug 02 11:21:29 EDT 2004 | sforman1
Use MicroCoat Technologies UV cure solder mask. will leave PCB absolutely clean. used in many PCB solder/wirebonding apps. http://www.m-coat.com
Electronics Forum | Wed Jun 25 09:42:09 EDT 2003 | caldon
SR. Here is a shot in the dark but have you try'd KNS? I know they have been working on some cool polymers...send them a note as they may have something that meets your needs. They may not have anything that can be removed but it is worth a try. pol
Electronics Forum | Tue Jul 01 17:38:24 EDT 2003 | jartman
I've faced this several times in the past, and the only real solution is to wirebond before SMT assembly. Everything leaves a residue, and trying to clean a residue off later is basically hopeless. This may require some trickery in your SMT process
Electronics Forum | Mon May 18 22:26:57 EDT 1998 | Steve Gregory
...Great minds think alike, huh? (GRIN) -Steve Gregory-
Electronics Forum | Mon May 18 21:29:38 EDT 1998 | D.Lange
| I've tried every thing I can think of. Do you have any | Ideas? | What I have is micro balls on the gold fingers of | panelize boards. These balls only appear on the gold | finger. Or at least I can only find them on the gold | fingers. | What I
Electronics Forum | Tue May 19 12:54:55 EDT 1998 | Richard Jackson
| We had a similar problem. But whenever the solder came from the screen printer the solder would wet to the gold fingers, with the help of residual flux. But the problem is balls, that I assume are not wetted to the gold fingers but instead are jus
Electronics Forum | Tue May 19 12:59:13 EDT 1998 | Mike
| Does any one know how to attach a picture to one of these posts? If it is possible I will attach a picture of what it is I'm seeing. Yea Email Steve Greg, he is always putting wierd Pics in here, but I like em | Thanks | Richard
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